Add mirrors tests

test/codegen/lib/mirrors/method_mirror_source_line_ending_lf.dart

Index: test/codegen/lib/mirrors/method_mirror_source_line_ending_lf.dart
diff --git a/test/codegen/language/regress_18865_test.dart b/test/codegen/lib/mirrors/method_mirror_source_line_ending_lf.dart
old mode 100644
new mode 100755
similarity index 60%
copy from test/codegen/language/regress_18865_test.dart
copy to test/codegen/lib/mirrors/method_mirror_source_line_ending_lf.dart
index ba64c4c9f51fff6ae2bc2e4f1605a8c0808ef472..b805a757a5d87c50b8db05f0c718fa7f96561cc1
--- a/test/codegen/language/regress_18865_test.dart
+++ b/test/codegen/lib/mirrors/method_mirror_source_line_ending_lf.dart
@@ -2,14 +2,14 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// Regression test for issue 18865.
+// Note: This test relies on LF line endings in the source file.
 
-class B<T> { }
+library line_endings.lf;
 
-class A<T> extends B {
-  static foo() => new A();
+oneLineLF(x) => x;
+multiLineLF(y) {
+  return y + 1;
 }
-
-main () {
-  A.foo();
+a
+(){
 }